Abstract
Insects, as one of the most important biogenic factors that have a significant impact on the survival of seedlings and productivity of Saxaul (Haloxylon).Eating or developing in the inside of the trunk, branches, shoots, leaves, roots, flowers and fruits, they cause significant changes in the composition and structure of plant communities, negatively affect the lifespan of plants, and overall for productivity of the grassland.In studies conducted in the desert area of the South-East of Kazakhstan we registered 35 species of Lepidoptera on the Saxaul (Haloxylon) that were trophically associated with different organs, and among them 8 species were as the potential pests of generative organs.